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allowaxestogrow.m
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allowaxestogrow.m
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function allowaxestogrow(f)
%
% Call allowaxestogrow(f) on a figure f with multiple sub-axes.
%
% Then, whenever one of the axes is clicked, it zooms to
% the size of the window (or a preset user-defined size).
% When clicked again, the axis returns to its original position.
%
% Useful when you have a number of tiny subplots in a figure window,
% and would like to be able to visually inspect them without squinting.
%
% To set the zoomed (large) size for an axis ax:
% setappdata(ax,'LastPosition',[LEFT BOTTOM WIDTH HEIGHT]);
% For colorbars, [0 0 0.85 1] usually works well.
%
% Version history:
%
% 0.40: Use get/setappdata instead of userdata. Use only one button-down
% function. Add some extra links between axes for extensibility.
% Suggestions by Jonas. 2009.05
% 0.32: Ensure invisible patch is created with correct figure parent. 2009.05
% 0.31: Try to preserve plot order better; reorder plots upon shrinking
% so that overlay axes, etc. are better respected. Still not perfect --
% ideally we'd preserve the original exact plot order. 2009.05
% Preserve plot aspect ratio when creating invisible axes, following
% suggestion by Jonas. 2009.04
%
% 0.30: Much simplified by using invisible patches to trap clicks.
% Now requires Matlab's OpenGL renderer which may cause side effects
% on some systems.
% Also, allows user to set predefined size for zoomed plot.
% Among other things, this makes colorbars finally work well. 2009.02
%
% 0.22: add workaround for reported bug when axis type is a cell array.
% also add click support for patches. 2007.06
% 0.21: add some support for colorbars 2007.06.
% 0.20: modified to support clicks on images and lines following suggestion
% from Jessica Louie 2007.05
% 0.11: Added code from Iram Weinstein to keep legends
% from disappearing. 2005.08
% 0.10: Written by Matthew Caywood, <[email protected]>, 2005.06
%
% Known bugs:
%
% Possible error if axes are plotted on top of panels.
% I don't use panels, so I'm not currently supporting them.
% Bugfixes are welcome, though. (reported by Scott Hirsch)
%
% With multiple axes in a subplot, clicks will sometimes magnify the wrong
% one, making the plot order wonky. For now, just keep clicking and it
% should fix itself.
if nargin==0, f=gcf; end
set(f,'Renderer','OpenGL');
% MSC necessary to avoid an OpenGL renderer bug where axes are flipped
% If you're having rendering problems, comment out the following line:
opengl('OpenGLBitmapZbufferBug',0)
% Cover all subplot axis children of figure f with an identically sized axis
% containing an invisible patch which triggers an event when clicked.
% Do not add to legends or colorbars.
doubleclick=0;
assignin('base','doubleclick',doubleclick);
ch = get(f,'Children');
for i = 1:length(ch)
ax = ch(i);
if (strcmp(get(ax,'Type'),'axes')) && ...
~strcmp(get(ax,'Tag'),'legend') && ...
~strcmp(get(ax,'Tag'),'Colorbar')
% invisible invisax contains patch p which traps clicks,
invisax = axes('Position',get(ax,'Position'), ...
'PlotBoxAspectRatioMode',get(ax,'PlotBoxAspectRatioMode'),...
'DataAspectRatioMode',get(ax,'DataAspectRatioMode'),...
'NextPlot','add');
% invisax contains a link to ax in appdata
setappdata(invisax,'VisibleAxes',ax);
setappdata(invisax,'State',0); % 1 = enlarged, 0 = normal/shrunk
axis off;
p = patch([0 0 1 1],[0 1 1 0],[0 0 0 0],'w');
set(p,'FaceAlpha',0);
set(p,'EdgeAlpha',0);
set(p,'ButtonDownFcn',@togglesubplot);
% tag the invisible axes so that they can be manipulated as necessary
set(p,'Tag','catchPatch')
setappdata(ax,'catchPatchHandle',p);
setappdata(ax,'InvisibleAxes',invisax);
% ensure invisible patch gets put on right figure
% MSC should not be necessary -- may work around
% bug when creating figures quickly, at least in R14
set(invisax,'Parent',f);
end
end
% -------------
function togglesubplot(src,eventdata) %#ok
doubleclick=evalin('base','doubleclick');
doubleclick=doubleclick+1;
if doubleclick==2
% default size of enlarged axes, modify as necessary
presetaxes = [0.05 0.05 0.9 0.9];
% patch p was clicked, get invisax and ax
p = src;
invisax = get(p,'Parent');
ax = getappdata(invisax,'VisibleAxes');
state = getappdata(invisax,'State');
% get current & last position
currentpos = get(ax,'Position');
futurepos = getappdata(ax,'LastPosition');
if isempty(futurepos), futurepos = presetaxes; end
% swap current & last position
set(ax,'Position',futurepos);
set(invisax,'Position',futurepos);
setappdata(ax,'LastPosition',currentpos);
% get order of parent figure's children
f = get(ax,'Parent');
ch = get(f,'Children');
if state == 1
% shrink
% send invisax and ax to back
newch = [ch(ax ~= ch & invisax ~= ch) ; invisax ; ax];
set(f,'Children',newch);
else
% enlarge
% change order of parent figure's children so clicked axis
% is drawn on top. But keep legend uppermost, if present.
% Find a legend for the current subplot, if it exists
ax = findobj(ax,'type','axes');
leg = find_legend(ax);
% move invisax and ax to top, then move legend if present
newch = [invisax ; ax ; ch(ax ~= ch & invisax ~= ch)];
if ~isempty(leg)
newch = [leg ; newch(leg ~= newch)];
end
set(f,'Children',newch);
end
doubleclick=0;
setappdata(invisax,'State',~state); % toggle state
try
if doubleclick == 0 && state == 0
set(invisax,'Position',[0.025 0.025 0.25 0.25]);
end
catch
end
end
assignin('base','doubleclick',doubleclick);
%----------------------------------------------------%
function leg = find_legend(ha)
% returns handle to legend
% from legend.m
fig = ancestor(ha,'figure');
ax = findobj(fig,'type','axes');
leg=[];
k=1;
while k<=length(ax) && isempty(leg)
if islegend(ax(k))
hax = handle(ax(k));
if isequal(double(hax.axes),ha)
leg=ax(k);
end
end
k=k+1;
end
%----------------------------------------------------%
function tf=islegend(ax)
% from legend.m
if length(ax) ~= 1 || ~ishandle(ax)
tf=false;
else
tf=isa(handle(ax),'scribe.legend');
end